ECHINONYSSUS Gallciae N. SP. (ACARI: LAELAPIDAE) from TALPA CAECA SAVI in SPAIN
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Vol.19, No. 2 Internal. J. Acarol. 123 104 3 ECHINONYSSUS GALlCIAE N. SP. (ACARI: LAELAPIDAE) FROM TALPA CAECA SAVI IN SPAIN A. Fain1 and A. Pereira-Lorenzo2 1. Institut royal des Sciences naturelles de Belgique, 29 Rue Vautiel; B-1040 Bruxelles. 2. Depmtamento de Microbiologia y Parasitologia, Catedra de Parasitologia, Facultad de Fa17llacia, Universidad de Santiago de Compos tela, Espafia ABSTRACT -A new species of laelapid mite, Echinonyssus galiciae n.sp. (Acari: Laelapidae), is described from Talpa caeca (Insectivora: Talpidae) collected in Galicia region of Spain. INTRODUCTION mum width in posterior half of genital shield 96, maxi mum length (including the membranous posterior lip of Recently, Pereira-Lorenzo and Quinteiro-Alonzo vulva) 234 (ratio length width = 2.43). Genital setae, (1988) studied the mesostigmatic mite fauna from In located on shield, 21 long. Anal shield oval, 75 long (to sectivora in the region of Galicia, Spain. Among other base of postanal seta) and 69 wide; adanal setae 20, genera present in this collection they found 4 species of postanal seta 22. Soft cuticle of opisthogaster with 24 the genus Echinonyssus Hirst, 1925. One of these, E. pairs of setae 13 to 27 long. Peritreme starting at level lukoschusi Tenorio and Radovsky (1979), was recorded of posterior margin of coxa III and reaching anterior for the first time from Spain. These authors also men half of coxa 1. tioned the presence on the mole Talpa caeca of an Peritrematal shield fused posteriorly with ex unnamed variation or subspecies ofE. lukoschusi char opodal shield of coxa IV. Coxal spurs 0-1-2-1. Coxa II acterized by the modification of the anteroventral seta with the anteroventral seta modified into a short, thick of coxa II into a bifid spine. All the specimens with this bifid spine; posteroventral seta setiform. Tarsus II with modification originated from the Province of La a pair of ventroapical spines. Length/width of leg seg Coruiia. A careful study of these specimens has ments: genu 45/54 - 49/51 - 30/44 - 45/42; tibia 48/45 revealed that they represent a new species, Echinonys 39/45 - 30/39 - 42/39; tarsus 72/33 - 57/33 - 53/30 - 69/31. sus galiciae. All measurements are given in ,urn. Gnathosoma, including the palps, 160 long, base 79 wide. Deutosternum with a single file of 7 (6 in Echinonyssus galiciae n.sp. paratypes) teeth and about 15 to 20 very small denticles irregularly arranged. Chelicerae: movable digit 37 long, (Figs. 1-4) total length of chelicerae (fixed digit included) 165, basal part 54. Female (holotype) (Figs 1-4): Idiosoma 490 long Male: Length and maximum width of idiosoma in and 300 wide (maximum width). Length and width in 3 3 paratypes: 375x228, 378x220 and 390x218. L x W of paratypes: 510x307, 504x305, and 480x310. Dorsum: dorsal shield: 375x204, 370x220 and 373x210 bearing 28 Dorsal shield 490 long, maximum width 243; bearing to 29 pairs of setae 6 to 19 long. Venter: Holoventral 25-26 setae of which 16 pairs located on podosomal shield with 8 pairs of setae 15 to 18 long. Coxae as in portion of shield. Lengths of the setae: jl 10, j2 15, .i3 female with anteroventral seta of coxae II modified in 12, j4 to j6 5 - 6, z217, z4 12, z56, s114, s3 13, s4 a small deeply forked spine. Chelicerae (in one 12, J1 and J2 4- 5, Z17, Z510, Slto S5 9-10. Venter: paratype) 102 long (fixed digit included), basal part 36 Sternal shield wider (125 at the level of 2d pair of ster long, movable digit 34 long. Free part of spermadactyl nal setae) than its median length (72). Sternal setae 25 15, total length 26. long. Metasternal setae situated on soft cuticle. Maxi- 124 Fain & Pereira-Lorenzo 1993 Figs 1-3. EchinollyssllS galiciae n.sp. (female) - 1. ventral idiosoma; 2. coxa II - enlarged; 3. tarsus II in ventrolateral view Remarks: This species is closest to E. lllkoschusi E .. JukoschllSi some scutal setae, e.g. z2, are 25 long. Tenorio and Radovsky (1979). It differs from that Other characters are as follows: In both sexes and in all species in both sexes by smaller size of the body, the tj~~ specimens, the modification of the anteroventral scutum and the chaetotaxy. In the female the longest ~;I"'ine of coxa II which is deeply bifid, while in E. lukos seta of the scutum is 17 long (in E. IllkoschllSi 29 long). bhllSi this spine is thicker, slightly curved and not In the male the scutal setae do not exceed 15 while in forked. shield in the female is much nar- Vol. 19, No. 2 Internat. J. AcaroI. 125 j5 '\ rz5 ~!.i ::-...: : 0 '. :' ~ j6 T 0 sS! " ~ ? z6 86/ \ J1 , Zl 0 0 ~ 0 d J2 S)e d J4 o o o l 84 Fig. 4. Echinonyssus galiciae n.sp. (female) - dorsal view rower (ratio width/length 1.73 in the new species in 14.I.1989 and hosts nO 638 and 639, 28.II. and stead of2.37 in E. lukoschusi) and the anal shield is oval 4.III.1989); 3 females from Dodro (host nO 476, (pear-shaped in E. lukoschusi). 27.VII.1985); 2 females from Santiago de Compostela Host and localities: All mites were collected from (host nO 406, 22.II.1985 and host nO 13, 11.III.1983). Talpa caeca, in the Province of La Corufia, region of Galicia, Spain (Collector: A. Pereira-Lorenzo). Holotype, 10 paratypes female and 1 paratype Holotype: female, from Coristanco (host nO 496, male in the collections of the Institut royal des Sciences 11.V.1985). Paratypes: 72 females and 2 males from La naturelles de Be1gique, 1 paratype female in the British Coruna (host nO 208, 21.x'1984); 5 females and 1 male Museum (Natural History). All other paratypes in the from Coristanco (hosts nO 496 and 498, 1l.Y.1985); 6 collection of the Facultad de Farmacia, University of females from Cerceda (hosts nO 634, n'xI.1987, Santiago de Compostela. 126 Fain & Pereira-Lorenzo 1993 REFERENCES Tenorio, J.M. and F.J. Radovsky. 1979. Review of the subfamily Hirstionyssinae, synonymy of Echino Pereira-Lorenzo, A. and M.P. Quinterio-Alonso. 1988. nysslts Hirst and Hil'stionysslts Fonseca, and Contribucion al estudio de los acaros del subor descriptions of four new species of Echinonysslts den Mesostigmata ectoparasitos de insectivoros (Acari: Laelapidae). J. Med. Entomol., 16: 370 en Galicia (Espaiia). Rev. Iber. Parasitol. 48: 189 412. 193. *****.